Saving window size and state into the registry.

發表時間：2003-03-31 14:40:24

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Saving window size and state into the registry. -------------------------------------------------------------------------------- http://www.hobbypages.net/snip18.html Don't you hate it when you make a few adjustments to a window size and put it where you want it, only to start the program again late and find it's right back where the author wanted it. Well here's what I do to make sure my apps stay where you left them. In the main form's header include these lines: #include and in the form classes private section: TRegistry *AppReg; int iLeft, iTop, iHeight, iWidth; String sState; bool isSound, isFull; In the form's cpp OnShow event:

void __fastcall TForm1::FormShow(TObject *Sender)
{
AppReg = new TRegistry;
AppReg->RootKey = HKEY_LOCAL_MACHINE;
if (AppReg->OpenKey("SOFTWARE\\Hobby Pages\\Snip of the Week\\1.0", false)==true)
        {
        try
                {
                sState = AppReg->ReadString("State");
                if (sState == wsMaximized)
                        {
                        Form1->WindowState = wsMaximized;
                        }
                else
                        {
                        iLeft = AppReg->ReadInteger("Left");
                        iTop = AppReg->ReadInteger("Top");
                        iHeight = AppReg->ReadInteger("Height");
                        iWidth = AppReg->ReadInteger("Width");
                        Form1->Left = iLeft;
                        Form1->Top = iTop;
                        Form1->Height = iHeight;
                        Form1->Width = iWidth;
                        }
                isSound = AppReg->ReadInteger("Sound");
                isFull =  AppReg->ReadInteger("ShowFull");
                CheckBox1->Checked = isFull;
                CheckBox2->Checked = isSound;
                }
        catch(...)
                {                    }
        }
delete AppReg;
//Do other opening stuff
}

Notice that the function OpenKey( ) is wrapped in an if () statement. That way if the program is run for the first time, or the entry was removed from the registry, the program will not fail there. It will simply start in the designed location and size. A compound if() statement, as you see. The second if bypasses the top, width, left, height reads if the window was closed while maximized. Windows then looks at the design size when the normal window button is pushed. Now to write the settings, we'll do it in the forms OnClose event, like this:

AppReg = new TRegistry;
AppReg->RootKey = HKEY_LOCAL_MACHINE;
AppReg->OpenKey("SOFTWARE\\Hobby Pages\\Snip of the Week\\1.0", true);
AppReg->WriteInteger("Left", Form1->Left);
AppReg->WriteInteger("Top", Form1->Top);
AppReg->WriteInteger("Height", Form1->Height);
AppReg->WriteInteger("Width", Form1->Width);
AppReg->WriteInteger("Sound", CheckBox2->Checked);
AppReg->WriteInteger("ShowFull", CheckBox1->Checked);
AppReg->WriteString("State", Form1->WindowState);
delete AppReg;

Besideds the size and state of the window at closing, I also saved the settings for a couple of check boxes as well. The users will appreciate the effort. 網路志工聯盟----Visita網站http://www.vista.org.tw ---[ 發問前請先找找舊文章 ]--- 發表人 - axsoft 於 2003/03/31 14:42:05